397996845 has 8 divisors (see below), whose sum is σ = 636794976. Its totient is φ = 212264976.

The previous prime is 397996813. The next prime is 397996849. The reversal of 397996845 is 548699793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397996845 - 2⁵ = 397996813 is a prime.

It is a super-3 number, since 3×397996845³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397996849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13266547 + ... + 13266576.

It is an arithmetic number, because the mean of its divisors is an integer number (79599372).

Almost surely, 2^397996845 is an apocalyptic number.

It is an amenable number.

397996845 is a deficient number, since it is larger than the sum of its proper divisors (238798131).

397996845 is a wasteful number, since it uses less digits than its factorization.

397996845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26533131.

The product of its digits is 14696640, while the sum is 60.

The square root of 397996845 is about 19949.8582701732. The cubic root of 397996845 is about 735.5742931641.

The spelling of 397996845 in words is "three hundred ninety-seven million, nine hundred ninety-six thousand, eight hundred forty-five".